On Monday 30 May 2005 4:38 pm, Jim Ramsay wrote:> I am attempting to get the 8520.c driver's serial console working with> a 16550A UART implementation, and have run into what I consider to be> a bug: In short, the proper 'port.type' for this serial port is not> set until the module init (serial8250_init) is called, so the FCR is> set incorrectly during serial8250_console_init for any port type which> is different than UNKNOWN.> > The exact problem is that the FCR is being set to '0x0' for a port> type of 'UNKNOWN', when for my specific 16550A, it should be set to> '0xC1' - and this makes my screen fill with empty characters instead> of the printk output I need.

Shouldn't a 16550A UART work correctly with FCR==0x0, i.e., with FIFOsdisabled? Is your UART broken?

Serial console output is always polled, one character at a time, soyou shouldn't need FIFOs until later.-To unsubscribe from this list: send the line "unsubscribe linux-kernel" inthe body of a message to majordomo@vger.kernel.orgMore majordomo info at http://vger.kernel.org/majordomo-info.htmlPlease read the FAQ at http://www.tux.org/lkml/